raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax…
Priority LOW 37CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · High
- Fix status
- Partial Red Hat: 2 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).
Why it matters now
EPSS 0.03117 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 2 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:librdf:raptor_rdf_syntax_library:2.0.15:*:*:*:*:*:*:* | 2.0.15 | Vulnerable | librdf |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
- cpe:2.3:a:librdf:raptor_rdf_syntax_library:2.0.15:*:*:*:*:*:*:* Versions 2.0.15 Vulnerable ·librdf
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
Remediation
Red Hat 1 advisory
- RHSA-2021:1842 Released 2021-05-18 · Red Hat rating Moderateraptor2 security and bug fix update
- Red Hat CodeReady Linux Builder (v. 8) raptor2-2.0.15-16.el8, raptor2-devel-2.0.15-16.el8
- Red Hat Enterprise Linux AppStream (v. 8) raptor2-2.0.15-16.el8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2021:1842 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:1842 |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2017-18926
- 2026-10-03 Alias added: GHSA-p2vv-g8rx-7jqj
References
Advisory 10
- [debian-lts-announce] 20201107 [SECURITY] [DLA 2438-1] raptor2 security update
- DSA-4785
- [oss-security] 20201113 Buffer Overflow in raptor widely unfixed in Linux distros
- [oss-security] 20201113 Re: Buffer Overflow in raptor widely unfixed in Linux distros
- [oss-security] 20201114 Re: Buffer Overflow in raptor widely unfixed in Linux distros
- [oss-security] 20201116 Re: Buffer Overflow in raptor widely unfixed in Linux distros
- [oss-security] 20201116 Re: Buffer Overflow in raptor widely unfixed in Linux distros
- FEDORA-2020-b15dd44972
- FEDORA-2020-d6675a61f1
- FEDORA-2020-3c1e69f1b1
Sources
- CVE-2017-18926 · CVE Program
- CVE-2017-18926 · NVD
- FIRST EPSS
- GHSA-p2vv-g8rx-7jqj · GitHub Advisory Database · CC BY 4.0
- CVE-2017-18926 · Red Hat security data · CC BY 4.0
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